Machine tool structure

Abstract

The structure comprises a rotary conventional lathe work piece holding spindle, mounted for sliding on vertical guides and a tool holding assembly mounted for sliding along two perpendicular horizontal axes. The tool holding assembly receives fixed tools and motorized auxiliary units whose rotational axis is either parallel to the axis of the spindle or perpendicular.

What is claimed is 
     
       1. A machine tool comprising: a. a work-piece-holding rotatable spindle;   b. drive means for driving said spindle rotationally at lathe speed about a horizontal axis;   c. a tool-holding assembly movable in horizontal translation with respect to the spindle along a longitudinal axis parallel to the spindle axis and also along a transverse axis perpendicular to the spindle axis, said tool-holding assembly being adapted to receive fixed tools and rotatable tools;   d. tools mounted fixedly on the tool-holding assembly;   e. means mounted on the tool-holding assembly for driving the rotatable tools rotationally;   f. a carriage on which said work-piece-holding spindle is mounted, said carriage being slidable on guides of the frame along a vertical axis;   g. said drive means for driving said spindle comprising at least one motor and electronic control means for adjusting the speed of rotation of the spindle and for stopping said spindle in successive given angular positions;   h. said means mounted on said tool-holding assembly for driving the rotatable tools including through bores for receiving and holding in position auxiliary work units with independent drive;   i. said rotatable tools being arranged in a first family having horizontal axes parallel to the axis of the spindle and a second family having horizontal axes perpendicular to the axis of the spindle;   j. said second family comprising a row of tools with horizontal axes along a vertical line;   k. said tool-holding assembly comprising two vertical walls perpendicular to each other having a vertical outer face having holes mounted for fixing a turning-tool holding plate, one of said walls having a series of horizontal through bores parallel to the axis of said spindle for receiving auxiliary work units, the other of said walls having a series of horizontal through bores perpendicular to the axis of the spindle for receiving auxiliary work units, and fixing holes for mounting different equipment in the upper part of said tool-holding assembly.   
     
     
       2. A machine tool comprising: a. a work-piece-holding rotatable spindle;   b. drive means for driving said spindle rotationally at lathe speeds about a horizontal axis;   c. a tool-holding assembly movable in horizontal translation with respect to the spindle along a longitudinal axis parallel to the spindle axis and also along a transverse axis perpendicular to the spindle axis, said tool-holding assembly being adapted to receive fixed tools and rotatable tools;   d. tools mounted fixedly on the tool-holding assembly;   e. means mounted on the tool-holding assembly for driving the rotatable tools rotationally;   f. a carriage on which said work-piece-holding spindle is mounted, said carriage being slidable on guides of the frame along a vertical axis;   g. said drive means for driving said spindle comprising:   i. a main motor and a digital control for controlling said main motor for high speed driving of said spindle;   ii. an auxiliary disengagable motor controlled by said digital control for providing slow speed driving of said spindle and for locking said spindle in chosen positions;   iii. angular position sensors for detecting the angular position of the spindle and for transmitting the detected information of said digital control.   
     
     
       3. A machine tool comprising: a. a work-piece-holding rotatable spindle;   b. drive means for driving said spindle rotationally at lathe speeds about a horizontal axis;   c. a tool-holding assembly movable in horizontal translation with respect to the spindle along a longitudinal axis parallel to the spindle axis and also along a transverse axis perpendicular to the spindle axis, said tool-holding assembly being adapted to receive fixed tools and rotatable tools;   d. tools mounted fixedly on the tool-holding assembly;   e. means mounted on the tool-holding assembly for driving the rotatable tools rotationally;   f. a carriage on which said work-piece holding spindle is mounted, said carriage being slidable on guides of the frame along a vertical axis;   g. said drive means for driving said spindle comprising at least one motor and electronic control means for adjusting the speed of rotation of the spindle and for stopping said spindle in successive given angular positions; and   h. said means mounted on said tool-holding assembly for driving the rotatable tools including through bores for receiving and holding in position auxiliary work units with independent drive.   
     
     
       4. A machine tool according to claim 3 further comprising a frame formed of a vertical upright and a horizontal bench and a connecting piece connecting said vertical upright and bench, said vertical upright having guides on which is slidably movable said carriage on which said work-piece-holding spindle is mounted, said horizontal bench comprising means for guiding and supporting said tool-holding assembly. 
     
     
       5. A machine tool according to claim 4 wherein said horizontal bench comprises horizontal transverse guides and a cross slide which is slidable thereon, said cross slide carrying longitudinal guides on which said tool-holding assembly is slidable. 
     
     
       6. A machine tool according to claim 3 wherein said tool-holding assembly further comprises through bores for receiving and disposing auxiliary work units along an oblique axis with respect to the axis of the spindle. 
     
     
       7. A machine tool comprising: a. a work-piece-holding rotatable spindle;   b. drive means for driving said spindle rotationally at lathe speeds about a horizontal axis;   c. a tool-holding assembly movable in horizontal translation with respect to the spindle along a longitudinal axis parallel to the spindle axis and also along a transverse axis perpendicular to the spindle axis, said tool-holding assembly being adapted to receive fixed tools and rotatable tools;   d. tools mounted fixedly on the tool-holding assembly;   e. means mounted on the tool-holding assembly for driving the rotatable tools rotationally, said rotatable tools being arranged in a first family having horizontal axes parallel to the axis of the spindle and a second family having horizontal axes perpendicular to the axis of the spindle;   f. a carriage on which said work-piece-holding spindle is mounted, said carriage being slidable on guides of the frame along a vertical axis; and   g. said drive means for driving said spindle comprising at least one motor and electronic control means for adjusting the speed of rotation of the spindle and for stopping said spindle in successive given angular positions.   
     
     
       8. A machine tool according to claim 7 wherein said second family comprises a row of tools with horizontal axes along a vertical line.